Engine oiling system



' March 8, 1932- B. H.V ANIBAL ENGINE OILING SYSTEM Fild April' '1 4. 1927 y BENJAMIN II. ANIBAL, OEIONTIAC, MIoIIIe-AN'AssIeNoR To jection to the measuring rodto pass Patented Mar. 8, 1932 i UNITED STATES PATENT OFFICE GENERAL MOTORS COR- PORATI'ON, OE DETROIT, MICHIGAN, A CORPORATION OE DELAWARE ENGINE OILING SYSTEM Application inea April 14,

My invention relates to lubricating systems for internal combustion engines and more particularly to the straining means commonly used in connection with the oil pump to prevent dirt or other solid matter from gettingl into the pump or bearings and damaging them. I

It has for its principal object the provision of a screen through which all oil returning to the oil panfrom the bearings or cylinder walls must pass, the screen being provided with an opening through which surplus oil from the pump may be returned to the oil pan without passing through thescreen. This is necessary because in coldweather the loi-l is apt to get so thick that the surplus discharged by the by-p ass might not flow readily through the screen, or the oil returning to the crankcase from the bearings and cylinders might be prevented from passing through the screen by a'film of cold oil previouslyV deposited on the screen and which would have to be heated l before any oil could pass through. This would vbe dangerous because there would be a possibility of the oil below the screen becom. ing exhaustedbefore the oil above the screen was thinned ont enough to pass through,` an

consequently the bearings might be damaged. There is also the possibility of the screen becoming clogged would interfere with from the pump. Tn my construction,

with dirt or sludge, -whic the return of surplus oil this bypassed oil is returned to the crankcase through the opening in the screen, therebeing noobthis as the surplus oil vhas come directly from the pump and is clean.

A further object is towutilize this Yopening in the screen for another purpose. Tt is common practice to use a measuring rod projecti crank case wall into theoil ing through the the level of the' oil in the pan to ascertain oi'lpan.

inanoil pan fitted with a screen. an opening must necessarily Vbe provided in the screen'for through; In vmy V`Another object is to aroundthe opening through which ysurplus panying drawings,

When such a vmeasuring rod is used l 1927. seriai N0..188,783. invention the opening which is` provided'to permit` the excess oil toy return to the oil pan without passingfthrough the screenalso serves as a passage through which the measuring stick may be inserted into `the oil pan. provide a bafie plate oil from the pump is'being discharged, for` the purpose of preventing such oil from splashing around in theV crank case and possibly getting on theconneoting rods and from there up into the combustion chamber. Itis very necessary that thelamount of oil which is supplied to the connecting rods belimited to a certain definite amount or otherwise the engine will kbe apt to smoke and an excessive amount of carbon will be formed. By the showing my Improved oiling system associh ated therewith.`

Figure 2 is a section taken on the line 2-2 of Figurev 1, showing larger scale.

Figure-'Sis a fragmentary view corresponding'toV Figure l but showing a slight modification.

Figure 4 Figure 3. i

The. numeral l0 is used to designa-te' av crankcase of an internal combustion engine to which is secured the usual oil pan-12 having 14 normally filled with oil. below the nor-f lgear type oil assump portion Secured in the oil pan slightly maloil level is a conventional pump with a curved intake pipeQO passing? otherv objects in view.

is a section taken on line of.

the parts on asomewhat the cra-nlcasecasting-l0. From the passage- 28 the oil goes to the cil pressure gauge andthe oilfi-lter (not shown)- normally closed" byV a ballv valve 32' liel'd in place by spring 34 and p The ball acts as a pressure relief valve to permit surplus oil delivered: bythe. pump-to re-r turn to the oil The screen definiteAY intervals, but should it not be cleaned often enough, or should. al poor gradey of' oil" pan through passage 38.

containing ani excess of sludge be* used, the" screen might become clogged. This wouldl interfere withth'e return` of oil into thel oi'lf pair and tliefsupplyof'oil? might' get belowtlie end? 22" of' the" inta-lie pipe and consequently the bearings wouldI not he' supplied withV oil. 'llo-eliminate this-possibility, I haveprovid-edf tile-screen with an cpeningulocated" directly beneath-thepassage 3ds@4V that' surplus oil discharged fronr the' by-p' assma/y return directly into'l they oil pan without passing 'through theY screen'. Thusl the pumpiwilli always be assured' of a supply ofoil as lo'ng as the level iskept above-a certain-point'.

lit will be readly'seen that' nom-atterhow thiclr Jc'he lay-passedv oil may be',it will' encounterno dilliculty in returning to the sunip= portion. sparticularly desirable because, in cold weather when the olli is likely tcbethick, there is a tendency on the-partof some drivers to1racethe engine to warm it up. It' isl during-'this' period that' the bearings should be liberallilfy supplied with oil to prevent-damage. y 4

To determine theleve'l of the oil' thepan, a eenventienal? measuring' rod 42 is inserted? through an opening in the cranlrease'walli and? extends down into the sumpp'ortion. @rdinaril'yan open-ing is provided* in the screen for this rod to pass through but my construction the red' isl se liceate'd that' it' will Jpasslthreughrthe opening toytlius eliminating the necessity of providing' another opening. f

Around the opening l0 l have placed' a baille plate 44e which serves'the dou-ble purpesef of preventing dirty oil from flowing' inte the sump with .t passing through. the screen,` and also tef de the surplus oil' discharged fr'oxnf passage 38 directly baci; into the sump insteafd`ofE permitting it to splash around inthe eranlca'se get on the concombustion chamber.

Communicating, with tlie passage 28 isV another passage. 30"

adjustable plug; 36..v

136 is supposed tobecleaned? at necting rods 46 and from them up into the This baffle plate may be soldered or otherwise secured to the screen and is also fastened to the oil pan.

Figures 3 and l show a construction where no oil measuring rod is used. In this case the opening l0 and the baille 4A- may be considerably smaller and of the shape shown.

It is thought from the foregoing taken in connection with the accompanying drawing that the.` construction and. operation of the deviceewillbe-apparentto those slrill'edf in the art, and that various changes in size, shape,

and. proportion and. details. of construction.

maybe madev without'. departing from the spirit andscope ofthe appendedol'aims.

I claims.

l. In combination with an internal combustionx.enginefhavingbearings to be lubricated, an oil pan, a screen extending horizontally across saldi pan. and'providedf with` an aperture; oil? from said' pan, ductf oil? fromV said pump to` saldi bearings, a sec'ondfconduit connected-lwitlrtlie first named' conduit atl a-v point between said pump. and.- said bearings, and a pressure relief valverle. cat-'edin said second condfuit',.t`l`1e discharge end of' 'said secondi conduit being located aboveY said'aperturein order-that' the oil pass-- ing? through said relief valve may return; toi

said oilf screen.

2. In= combination an internal? come bustiongengine having bearings toQbe` lubrifcat'ed; an' oil? pan, a; screen extending horizont'al'ly across said pan and providedl with anA aperture, an oil pump adapted to: with: draw oili froml said pan', a' conduit adapte'df to conduit oil' from said pump tofsai'd' bearings;

pan without passing' through.i saida second conduit' connected with the first:

named conduit at a= point between? said pump andiy said bearings, a pressurel relief valve lo.- cated in said; second' conduit', the discharge end? of" saidg second conduit bein-g located above said aperture in: orderthatthe oil pass-- relief valve may return tof ing' through said said' oil? pan without' passing' through said,E screen. andl a wall secured to said screen. around'th'e edge ofisaid aperture safidiwal'lf extend-ing upwardly from: said screen for the purpose of' preventing substances deposited on the upper surface ofthe screen frompass'- ing tlrroughl saidf aperture. V

Iny combina-tion with` an internal coin-- bustion engine having bea-rings toI be lubricated' a crankcasey comprisingupper and lower' halves, horizontally across said pan and? provided with an aperture,

A an oilipump adaptedr tof withdraw oil from said pan, a conduit adapted to conduct oil from said pump to saidY bearings, a second conduit connected with the first named conduit at a point between said pump and said bearings, 'said second conduitan oil pump" tol withdrawlT af conduit adapted. tov con-- an oilf pan, a screen extending lEll) 

